PreSonus AudioBox USB User Manual
Page 9
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Owner’s Manual
Ov
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Connec
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Comput
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Tut
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Technical Informa
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Tr
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W
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Studio O
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Hookup 2
Hook
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Input Gain/Trim Control. These knobs provide the following gain structure:
•
XLR Microphone Instrument inputs: 40 dB of variable gain (-10 to +30 dB)
•
TS ¼-inch Instrument Level inputs: 60 dB of variable gain (0 dB to +60 dB)
Clip Indicator. All channels feature clip LEDs next to the trim controls. The red clip
indicator LED will illuminate when the channel’s input signal reaches 0 dBFS. At this
level, your mic preamp/line trim signal will exhibit signs of clipping (distortion).
Power User Tip: Never run your input levels higher than the channel inputs can handle. If you overdrive
the analog-to-digital converters, it will cause digital distortion (digital clipping), which sounds terrible.
Mixer. The Mixer knob allows you to blend your input signals with the playback
streams from your computer. This allows you to monitor your input signal with
zero latency. If the knob is positioned at 12 o’clock, the input signal and the
playback stream will be equally balanced. Turning the knob to the left will increase
the level of the input signal relative to the playback stream; turning to the right
will increase the level of the playback stream relative to the input signal.
Please note: When creating monitor mixes using Studio One or another DAW, it is important that
you turn the Mixer knob all the way to the Playback position. Monitoring both the input signal
and the playback stream will create a doubling effect that will make monitoring difficult.
Phones. The Phones knob controls the volume of the headphone output
on the rear of the unit. The headphone amplifier is quite powerful, and the
volume goes to 11, so use the maximum setting with extreme caution.
Main. The Main knob controls the output level for the Main Outputs
on the back of the AudioBox, with a range of -80 dB to 10 dB.
Power LED. This LED will illuminate red when the AudioBox is
properly powered and synced to a USB connection.
Front-Panel Connections 2.1